This is a variant of XIAO BLE with additional features:
* LSM6DS3TR-C 6D IMU (3D accelerometer and 3D gyroscope),
* PDM microphone.
Since LSM6DS3TR-C is almost the same as LSM6DSL (the former has slightly
higher current consumption than the latter, but the register map looks
exactly the same), add devicetree node with "st,lsm6dsl" compatible.
LSM6DS3TR-C is powered directly by P1.08 pin and I2C pull-ups are also
connected to this IO pin. Add a fixed regulator, which will be always on
for this board, in order be able able to use this IMU out of the box.
Signed-off-by: Marcin Niestroj <m.niestroj@emb.dev>
9c8b4be073